IUE Public Relations Images
These are public relations images obtained by IUE during its continuing
mission, and are identical in format to those used by the IUE staff and guest
observers. False color has been added to most images. This page is also
available with lots of in-lined images.
Much of the information for these images was made available by Scott
Snell, Computer Sciences Corp.
There are two image types: acquisition and spectrum. Acquisition images are
taken by the Fine Error Sensor (FES) in a scanning mode: it is commanded to
step its aperture across the field if view in a raster pattern to generate a
field image. The pixel size is limited by the size of the FES aperture, eight
arc seconds. The maximum image size is 16 arc minutes. To the left of the
image, North and East are indicated, as well as the spacecraft orientations for
Pitch and Yaw. The first set of axes changes from image to image because IUE
is required to maintain a fixed orientation with respect to the Sun, not the
stars. The second set remains constant since it is fixed within the spacecraft
body. Dark patches which appear near the center of the field of view are
apertures in the science instrument that admit light to the spectrographs.
Raw spectrum images are obtained by projecting the target spectrum onto an SEC
vidicon, which is then "read down" to the ground station at the end
of the exposure. The low dispersion images contain a single
spectrum on the faceplate, except for the Supernova 1987A
images, which contain two spectra - one each for the large and small apertures.
The short wavelengths are at the top of the images, with the longer wavelengths
at the bottom. In many of the SWP images, a broad emission line is present
near the top arising from the cloud of hydrogen that surrounds the Earth, and
is not intrinsic to the target.
The high dispersion images (Neptune and Spica) appear to consist of numerous spectra. Each part, or
order, covers only a small part of the total range of the detector. These
orders are combined to create a single spectrum covering essentially the same
range as a low dispersion spectrum, but with greater resolution. For both
types of spectra, plots are presented that show the spectrum after it has been
processed. The low dispersion plots cover the complete spectrum, while the
high dispersion plots only include a portion of the spectrum.
Raw Spectrum |
Reduced Spectrum
Details about this spectrum are available.
Acquisition Image
Mars was observed by IUE when it was...
Acquisition Image |
Raw Spectrum |
Reduced Spectrum
Jupiter and three of its four large moons...
Raw Spectrum |
Reduced Spectrum
The ring of sulfur compounds encircling Jupiter...
Raw Spectrum |
Reduced Spectrum
Saturn was observed by IUE...
Raw Spectrum |
Reduced Spectrum
Details about this spectrum are available.
Raw Spectrum |
Reduced Spectrum
Uranus' rotational axis is nearly in the plane...
Raw Spectrum |
Reduced Spectrum
This high dispersion spectrum of Neptune was taken...
Acquisition Image
Comet Giacobini-Zinner was observed by IUE...
Acquisition Image
Details about this image are available.
Raw Spectrum |
Reduced Spectrum
Comet Austin (1989c1) showed a typical comet
spectrum...
Raw Spectrum |
Reduced Spectrum
IUE observed Comet IRAS-Araki-Alcock (1983d) as the
comet passed...
Acquisition Image
Details about this image follow.
Acquisition Image
Eta Carina is an object embedded in a bright
nebula...
Acquisition Image
16 Cygni A and B are two stars similar to...
Raw Spectrum |
Reduced Spectrum
Details about this spectrum follow.
Raw Spectrum |
Reduced Spectrum
Details about this spectrum are available.
Raw Short Wavelength Spectrum |
Reduced Short Wavelength Spectrum
Raw Long Wavelength Spectrum |
Reduced Long Wavelength Spectrum
Details about these spectra are available.
Raw Short Wavelength Spectrum |
Reduced Short Wavelength Spectrum
Raw Long Wavelength Spectrum |
Reduced Long Wavelength Spectrum
Supernova 1987A was the closest supernova since
the invention of the telescope...
Raw Spectrum |
Reduced Spectrum
LMC X-3 is believed to be a binary system consisting
of...
Raw Spectrum |
Reduced Spectrum
Fairall 9 shows a typical Seyfert galaxy spectrum...
Page developed by
IUE Project Staff at Goddard Space Flight Center
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Last updated:14 Aug 1998
Maintained by MAST staff
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